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La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ Electrodes for YSZ-based Symmetrical SOFC
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China University of Mining &Technology, Beijing,China University of Mining &Technology, Beijing,China University of Mining &Technology, Beijing,China University of Mining &Technology,Beijing

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    Abstract:

    La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ(LSCFN),a perovskite oxide materials, have been synthesized by the solid state reaction method .The electrolyte-supported symmetrical solid oxide fuel cells were fabricated by tape-casting and screen-printing procedure using YSZ as electrolyte, GDC as interlayer and LSCFN as both anode and cathode. The crystal structure and chemical stability were examined by X-ray diffraction (XRD) and microstructure was inspected by scanning electron microscopy (SEM). The electrical properties of single cell were tested by using humidified 3% H2 and CH4 as fuel respectively, ambient air as oxidant and tested the stability in humidified 3% CH4 at 850℃.The results show that LSCFN appeared to be chemically compatible with GDC to at least 1400℃. The maximum power density was 254 mW cm-2 and 105 mW cm-2 in humidified H2 and CH4 at 850℃, respectively. Stable performance was sustained for at least for 100 h operating in humidified CH4. These results suggest that the LSCFN can potentially serve as an electrode for symmetrical SOFCs with YSZ electrolyte.

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[Niu Yushuang, yangzhibin, Zheng Ziwei, Han Minfang. La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ Electrodes for YSZ-based Symmetrical SOFC[J]. Rare Metal Materials and Engineering,2017,46(1):262~265.]
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History
  • Received:October 10,2014
  • Revised:October 31,2014
  • Adopted:December 03,2014
  • Online: March 16,2017
  • Published: